Architectural

Acoelorrhaphe wrightii is native to Florida and parts of the Caribbean, this striking fan palm is small to moderately tall. Hardy to -6°C (20°F) it is one of just a few palms that can survive in saturated soil conditions. A good outdoor palm for a milder areas and a very tropical alternative to a hedge of shrubs.

Aconitum napellus subsp. vulgare Albidum is a superb white form of the most popular Monkshood. Hardy, long lived and maintenance free, they are choice mid to late season vertical accent plants. The stiff stems are self-supporting with handsome leathery green foliage.

Aconitum napellus ‘Newry Blue’ is an outstanding old Irish cultivar with wonderful upright spires of the deepest rich blue that tower over the back of the border. Known for its dense spires, they are every bit as dramatic as you could hope for them to be.

Agapanthus Getty White is a sparkling plant with dense clusters of white flowers on erect stems. It is a sparkling plant and is dazzling against a dark green backdrop. They are terrific as cut flowers and are suited to both formal and modern style arrangements.

Raised by the Hon. Lewis Palmer in the late 1940s in his garden at Headbourne Worthy, Hampshire. The Headbourne Hybrids is a very special strain, being both one of the hardiest that you can grow and the most “violet” blue available. RHS AGM

Agave mckelvyana is a small, relatively rare species of American Agave from western Arizona. This little beauty forms a tight rosette of broad, bluish green, fleshy leaves with small teeth. It is one of the hardiest agaves, it can take winter rain and is tolerant of drought and severe freezes to minus 15°C.

Agave parryi is a dramatic specimen that forms a compact rosette of bluish green leaves, heavily armed with dark tipped spines. Cold hardy to minus 18°C it will withstand snow and ice and has the ability to grow 60cm wide and as tall. This stylish succulent has long been highlighted in magazines and television shows.

Agave utahensis is an uncommon plant, native to the dry limestone canyons of the Mojave Desert. The variety nevadensis is one of the smallest species and one of the most cold hardy, down to around minus 26°C. It is often used as feature plants in modern style landscapes.

Agave xylonacantha 'Blue' is the beautiful blue-green leafed form. Rare in cultivation, this dramatic specimen is armed with the most bizarre large white teeth of all the family. One of its previous names, Agave carchariodonta was in reference to the teeth (odonta) of the Great White Shark, Carcharodon carcharias.

Hollyhocks are a mysterious and prolific flower with a long and rich history. Traditionally associated with cottage-style borders, the dramatic, near-black flowers of Nigra work equally well in a contemporary, minimalist garden. This unique variety creates an impressive impact against most backgrounds.

Ammi majus is tall, branching flower, with finely divided, feathery foliage. In summer, it bears an abundance of large round blooms made up of clusters of tiny white florets on tall, branched, slender stems. The delicate clusters add beauty and depth to bouquets and meadows alike.

Ammi visnaga 'Green Mist' is a new variety of Queen Annes Lace, with larger, darker green and more mounded umbels than its cousin Ammi majus. It flowers from June to September the blooms are initially flattened and lime green, turning white. The textured flower heads are a flower arrangers dream.

Ammi lends a delicate airiness to any border and is often used to create a cohesive flower bed. It associates well with both annuals and perennials and makes an excellent addition to wildlife gardens, luring bees and butterflies to the nectar rich flowers. Organic Seed.

Anagallis monellii has one of the brightest gentian-blue flowers available. A charming and unassuming plant, easily raised from seed. Full sun encourages the most prolific display of intense blue flowers, in an endless procession from late spring to first frosts.

Incredibly easy to grow the Annual Dwarf Flowers Mix grows to around 30cm (12in) tall. Flowering just 10 to 12 weeks from sowing, these fast-growing plants provide an easy and cost-effective way to give naturalistic planting, plug gaps and fill the border with a summer full of colour.

The Semi-Tall Flowers Mix is a richly flowering mixture of that produces large quantities of 50cm (20in) tall annual flowers for the border or for cutting. As well as being ornamental, they will provide nectar and pollen for bees, butterflies and other insects from early in the year to late in the season.

Composed of a finely balanced selection of annual flowers designed to provide a long succession of flowers from June to September, the Tall Flowers Mix grows 60 to 70cm (24 to 28in) tall and produces large quantities of flowers that are ideal for the border and for the vase.

Canna indica is a superb tall strain with gorgeous foliage and bright vermilion red blooms. Growing to around 150cm tall, the wide banana-like leaves add a tropical feel to the garden. They are ideal to plant at the back of a border where they are in full sun, or to add colour to a partly shady area.

Canna 'Large Flowered Hybrids' create an undeniably tropical look, producing large flowers in hot colours in yellow, gold, fiery orange and red. With their lush tropical foliage and showy flowers they make borders and beds come alive with their bright colours all summer long until first frosts.

Actaea cordifolia comes into its own late in the season, when multiple stiff and stout stems emerge from the base of the plant. It displays impressive long racemes of chalky-white blooms that are composed of numerous, tiny individual star-like, fragrant flowers.

Actaea simplex is a spectacular plant. With long, fluffy spires in pale pinkish-white that seem to float in mid-air. Stunning when grown in groups, while single plants have good specimen value, they add architectural height and late summer bloom to the back of a shady border.

The 'Cornish Palms' make fantastic points in containers or borders: their evergreen leaves provide interest throughout the year. The long slender leaves and a slow-growing trunk make this an architectural plant that lends itself to modern interiors.

This unusual pink form of pampas grass with tall, pink-flushed, feathery plumes is a real show stopper. In midsummer spectacular plumes erupt above the foliage. The show continues into winter as the feathery plumes persist and the foliage turns golden brown when touched by frost.